Often, though, people will keep an item for sentimental reasons even if that item causes them stress. There are many times when someone will keep something because it’s sentimental, but they don’t actually like the item, or use it, or need it. They keep it more out of guilt than any other emotion. In this case, you should ask yourself how the item really makes you feel. Does it make you feel wonderful? Keep it. If it makes you feel sad, anxious or guilty, it should go.
Other times, people will keep things because they do give them a wonderful feeling, but they keep too many of them and feel overwhelmed by the volume. In this case, ask yourself “how much is enough to meet my emotional needs?”. How many of Grandma’s vases are enough to get the warm fuzzies without overflowing the cupboards? You can still get the emotional need met, but without the overwhelm.